Fish Consumption

Higher fish consumption is associated with lower Alzheimer's and cardiovascular disease risk in observational data. Regular fish consumers are advised to keep fish to a small portion of their overall diet. Early mercury-toxicity studies are said to have relied on pilot whales rather than actual fish. Actual fish are described as usually having more selenium than mercury, which may partially neutralize mercury toxicity. Larger fish species have higher mercury concentrations than smaller fish due to food-chain bioaccumulation. Microplastic contamination is said to be widespread in ocean fish and increasing over time. Fish contamination risks are described as worsening. Smaller fish species are preferable for consumption because they carry lower mercury concentrations.